<?php
/**
 * @package php-font-lib
 * @link    https://github.com/PhenX/php-font-lib
 * @author  Fabien Ménager <fabien.menager@gmail.com>
 * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
 */

namespace isszz\captcha\font\lib\table\type;
use isszz\captcha\font\lib\table\Table;
use Exception;

/**
 * `head` font table.
 *
 * @package php-font-lib
 */
class head extends Table
{

	protected $def = [
		"tableVersion"       => self::Fixed,
		"fontRevision"       => self::Fixed,
		"checkSumAdjustment" => self::uint32,
		"magicNumber"        => self::uint32,
		"flags"              => self::uint16,
		"unitsPerEm"         => self::uint16,
		"created"            => self::longDateTime,
		"modified"           => self::longDateTime,
		"xMin"               => self::FWord,
		"yMin"               => self::FWord,
		"xMax"               => self::FWord,
		"yMax"               => self::FWord,
		"macStyle"           => self::uint16,
		"lowestRecPPEM"      => self::uint16,
		"fontDirectionHint"  => self::int16,
		"indexToLocFormat"   => self::int16,
		"glyphDataFormat"    => self::int16,
	];

	protected function _parse()
	{
		parent::_parse();

		if ($this->data["magicNumber"] != 0x5F0F3CF5) {
			throw new Exception("Incorrect magic number (" . dechex($this->data["magicNumber"]) . ")");
		}
	}
}